How can I make a cascade deletion in a one_to_many relationship in Rails ActiveRecord?
activerecord, cascade, cascading-deletes, ruby-on-rails
Solution
jdl's answer is correct - you need to add `:dependent => :destroy` to both relationships - i.e. in your `User` class, add it to `has_many :orders`, and in your `Order` class, add it to `has_many :order_items`.
You might also want to change the MySQL behaviour wrt foreign keys, perhaps setting them to `ON DELETE CASCADE`.
Problem
I have a model in rails with one_to_many relationship. When I delete the father, I'd like to delete all childrens. How should I do it? I want to delete all orders and its items when I delete a user My models are: ``` class User < ActiveRecord::Base has_many :orders, :foreign_key => "id_user" end class Order < ActiveRecord::Base has_many :order_items, :foreign_key => "id_pedido" belongs_to :user, :foreign_key => "id_usuer" end class OrderItem < ActiveRecord::Base belongs_to :order, :foreign_key => "id_pedido" end ```